Do feather extensions have any drawbacks?

No, feather hair extensions have NO drwbacks as far as i know. I've had one for about a month. I've washed it, curled it, straightened it, swam with it, and it's still vibrant in color and perfectly in tact. You can be rouogh with it, it won't fall out unless you use pliers... To get them from a salon they can range from $10 to $45. I personally got mine done at a surf shop for $10. It's neon blue and its about 4 inches long. ALl in all, feather hair extensions are worth it, very durable, long-lasting and you'll love it forever! (: